WW2 British short sleeve shirt No.4

This is an item I haven’t encountered before and bought 3 for my own collection straight away.
It is short sleeve shirt made of wool.
Wool will fall apart when it is stored in the wrong way and that is also one of the reasons that it is very hard to get original wartime wool shirts.
Shirt is white / crème coloured and in average condition.

Markings:  see pictures
Condition: dirt from storage / some moth damage